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1.
Cir Pediatr ; 37(3): 137-140, 2024 Jul 09.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-39034880

RESUMO

INTRODUCTION: Intestinal obstruction secondary to the use of fortified milk is a rare cause in pre-term patients. CASE REPORT: We present the case of a female pre-term newborn admitted as a result of abdominal distension and rectal bleeding, which mimicked necrotizing enterocolitis. On abdominal X-ray, she had an obstruction pattern, and on ultrasonography, echogenic masses at the distal ileum were observed. Given the lack of improvement with conservative management, urgent exploratory laparotomy was decided upon. At surgery, compact milk masses at the level of the distal ileum were identified as the cause of intestinal obstruction. Appendicostomy and lavage with saline solution through the ileocecal valve were performed. This allowed milk masses to come out towards the colon, and a great amount of acholic stools to be expelled. CONCLUSION: The increase in "milk curd syndrome" cases should lead us to consider this cause in the differential diagnosis of intestinal obstruction in pre-term newborns fed with fortified milk.


INTRODUCCION: La obstrucción intestinal secundaria al uso de leche fortificada es una causa infrecuente descrita en pacientes prematuros. CASO CLINICO: Presentamos el caso de una recién nacida prematura que ingresa por distensión abdominal y rectorragia, simulando una enterocolitis necrotizante. En la radiografía abdominal presenta patrón obstructivo y en ecografía se identifican masas ecogénicas en íleon distal. Dada la no mejoría con manejo conservador, se decide laparotomía exploradora urgente. En la intervención se detectan masas compactas de leche a nivel de íleon distal como causa de la obstrucción intestinal. Se realiza apendicostomía y lavado con suero fisiológico a través de la válvula ileocecal, permitiendo salida de moldes hacia colon y expulsión de gran cantidad de heces acólicas. CONCLUSION: El repunte de casos de "milk curd syndrome" nos obliga a considerar esta causa en el diagnóstico diferencial de obstrucción intestinal en prematuros alimentados con leche fortificada.


Assuntos
Recém-Nascido Prematuro , Obstrução Intestinal , Leite , Humanos , Feminino , Obstrução Intestinal/etiologia , Obstrução Intestinal/cirurgia , Recém-Nascido , Leite/efeitos adversos , Animais , Alimentos Fortificados , Doenças do Prematuro/etiologia , Diagnóstico Diferencial
3.
Herz ; 45(1): 79-85, 2020 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-29767330

RESUMO

BACKGROUND: The most common cause of procedural failure in cardiac catheterization using the transradial approach is radial artery spasm. The aim of this study was to compare the procedural success rate of the 6­Fr Glidesheath Slender with the 6­Fr standard sheath in transradial coronary angiography and intervention. METHODS: Patients who underwent percutaneous coronary angiography via the transradial approach through placement of a 6-Fr Glidesheath Slender or a 6-Fr standard sheath for primary radial access were prospectively enrolled in the study. RESULTS: The study included 200 cases: 76 patients undergoing percutaneous coronary angiography with the Glidesheath Slender and 124 patients with the standard sheath. Failed procedures were recorded for 19 patients (9.5%), defined as inability to complete the procedure via the primary access. There was no difference in the percentage of failed cases between the Glidesheath Slender and standard sheath groups (10.5% vs. 8.9%, OR = 1.21, p = 0.8). More cases of spasm were observed in the Glidesheath Slender group compared with the standard sheath group, which was not statistically significant (7.9% vs. 5.7%, OR = 1.43, p = 0.56). Smoking, hyperlipidemia, and age influenced the procedural outcome in the Glidesheath Slender group, while body mass index, sex, and smoking impacted the procedural outcome in the standard sheath group. CONCLUSION: There is no difference in procedural success rates, as defined by the ability to complete the procedure via primary radial access, between the 6­Fr Glidesheath Slender and the 6­Fr standard sheath. Our study suggests that the patient characteristics that elevate the risk of procedural failure for Glidesheath Slender may differ from those for the standard sheath.


Assuntos
Cateterismo Cardíaco , Angiografia Coronária , Intervenção Coronária Percutânea , Vasoespasmo Coronário , Feminino , Humanos , Masculino , Artéria Radial , Resultado do Tratamento
4.
Rev Calid Asist ; 32(2): 97-102, 2017.
Artigo em Espanhol | MEDLINE | ID: mdl-28169104

RESUMO

OBJECTIVE: To perform a benchmarking on the safe identification of hospital patients involved in "Club de las tres C" (Calidez, Calidad y Cuidados) in order to prepare a common procedure for this process. MATERIAL AND METHODS: A descriptive study was conducted on the patient identification process in palliative care and stroke units in 5medium-stay hospitals. The following steps were carried out: Data collection from each hospital; organisation and data analysis, and preparation of a common procedure for this process. RESULTS: The data obtained for the safe identification of all stroke patients were: hospital 1 (93%), hospital 2 (93.1%), hospital 3 (100%), and hospital 5 (93.4%), and for the palliative care process: hospital 1 (93%), hospital 2 (92.3%), hospital 3 (92%), hospital 4 (98.3%), and hospital 5 (85.2%). CONCLUSIONS: The aim of the study has been accomplished successfully. Benchmarking activities have been developed and knowledge on the patient identification process has been shared. All hospitals had good results. The hospital 3 was best in the ictus identification process. The benchmarking identification is difficult, but, a useful common procedure that collects the best practices has been identified among the 5 hospitals.


Assuntos
Benchmarking , Sistemas de Identificação de Pacientes/normas , Humanos , Melhoria de Qualidade
5.
Life Sci ; 172: 8-12, 2017 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-28131760

RESUMO

AIMS: Reactive oxygen species (ROS) are generated in the ischaemic myocardium especially during early reperfusion and affect myocardial function and viability. Monoterpenes have been proposed to play beneficial roles in diverse physiological systems; however, the mechanisms of action remain largely unknown. This study aims to assess the effect of monoterpene geraniol (GOH) on neonatal rat ventricular cardiomyocytes (NRVCs) subjected to oxidative stress. MAIN METHODS: We used an in vitro model of hypoxia-reoxygenation. Cardioprotective (AMPK) and cardiotoxic (ERK1/2, ROS) signaling indicators were measured. Assays were performed by fluorogenic probes, MTT assays and Western-blots. KEY FINDINGS: We determined that the addition of GOH (5-200µM) to cultured normoxic and hypoxic-NRVCs diminished the endogenous production of ROS in stressed cardiomyocytes. We observed that GOH treatment increased pAMPK levels and decreased pERK1/2 levels in cultured NRVCs. SIGNIFICANCE: This report suggests that GOH is a candidate cardioprotective natural compound that operates by blunting the oxidative stress signaling that is normally induced by hypoxia-reoxygenation.


Assuntos
Produtos Biológicos/farmacologia , Cardiotônicos/farmacologia , Miócitos Cardíacos/efeitos dos fármacos , Terpenos/farmacologia , Monoterpenos Acíclicos , Animais , Células Cultivadas , Peróxido de Hidrogênio/farmacologia , Miócitos Cardíacos/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Ratos , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo
6.
EJVES Short Rep ; 32: 21-23, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-28856311

RESUMO

INTRODUCTION: A case is reported of left brachiocephalic vein thrombus removal using the Angiovac device within a stented venous segment via a through-and-through access technique. REPORT: This novel technique involves obtaining through-and-through access from the left basilic vein to the right femoral vein, which then facilitates the advancement of the Angiovac device to successfully remove in a stepwise fashion the thrombus present within a stented region of the left brachiocephalic vein. DISCUSSION: The Angiovac device has been shown to be very useful and effective at removing large amounts of thrombus, tumor, and foreign bodies within arterial and venous systems successfully. This novel technique uses the through-and-through venous access approach to allow for this device to remain close to the targeted area of thrombus burden and prevent damage of the already existing stents in this region.

7.
Cir Pediatr ; 27(1): 49-51, 2014 Jan.
Artigo em Espanhol | MEDLINE | ID: mdl-24783647

RESUMO

INTRODUCTION: Ureteral triplication is considered a rare anomaly and its association with ectopic ureterocele, is unusual. CLINICAL CASE: We report a male with a history of recurrent urinary tract infections, who showed left vesicoureteral reflux associated with apparent ureteral duplication in multiple test performed, and only during the vesicostomy was discovered a third ureter ending in a ectopic ureterocele corresponding with the upper pole ectopic kidney. CONCLUSIONS: Being a very unusual and complex pathology, and despite all the tests made, it is very difficult to make an accurate presurgical diagnosis, therefore the diagnosis sometimes is only performed during the surgical treatment, which must be individualized according to fthe unctional stage of each renal portion and the termination of each ureter.


Assuntos
Ureter/anormalidades , Ureterocele/cirurgia , Infecções Urinárias/etiologia , Refluxo Vesicoureteral/etiologia , Pré-Escolar , Humanos , Rim/anormalidades , Masculino , Recidiva , Ureter/cirurgia , Ureterocele/diagnóstico , Ureterocele/patologia
8.
J Cardiovasc Surg (Torino) ; 55(3): 339-45, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24755702

RESUMO

The prevalence of PAD is expected to increase as the population ages and the treatment for chronic disease becomes more sophisticated. The safety, efficacy, and lower cost of endovascular treatment for peripheral vascular disease of the lower extremities when compared with surgical revascularization are well known. Despite the clinical improvements and advances in endovascular techniques over the past decade, in-stent restenosis of peripheral arteries remains a challenge for the endovascular specialist. The use of excimer laser atherectomy has been shown to be safe and effective for the revascularization of complex, critical de novo peripheral lesions and offers promise in the treatment and prevention of in-stent restenosis.


Assuntos
Angioplastia com Balão a Laser/instrumentação , Angioplastia com Balão/instrumentação , Aterectomia/instrumentação , Stents Farmacológicos , Lasers de Excimer/uso terapêutico , Doença Arterial Periférica/terapia , Angioplastia com Balão/efeitos adversos , Angioplastia com Balão a Laser/efeitos adversos , Animais , Aterectomia/efeitos adversos , Constrição Patológica , Humanos , Doença Arterial Periférica/diagnóstico , Recidiva , Retratamento , Resultado do Tratamento
9.
Yeast ; 30(9): 331-9, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23775541

RESUMO

Candida tropicalis is an emerging virulent species. The aim of this study is to determine the biofilm-forming ability of 29 strains of C. tropicalis isolated from inpatients, and to examine its relation with other virulence factors such as cellular surface hydrophobicity (CSH), immediate (15 min, IA) and late (24 h, LA) plastic adherence and filamentation ability. The study was performed in parallel using two incubation temperatures - 37 and 22 °C - to determine the effect of growth temperature variations on these pathogenic attributes of C. tropicalis. Biofilm formation (BF) was measured by optical density (OD) and by XTT reduction (XTT); Slime index (SI), which includes growth as a correction factor in BF, was calculated in both methods. All strains were hydrophobic and adherent - at 15 min and 24 h - at both temperatures, with higher values for 22 °C; the adhered basal yeast layer appears to be necessary to achieve subsequent development of biofilm. Filamentation ability varied from 76.2% of strains at 37 °C to 26.6% at 22 °C. All C. tropicalis strains were biofilm producers, with similar results obtained using OD determination and XTT measurement to evaluation methods; SI is useful when good growth is not presented. BF at 37 °C was similar at 24 h and 96 h incubation; conversely, at 22 °C, the highest number of biofilm-producing strains was detected at 96 h. CSH is an important pathogenic factor which is involved in adherence, is influenced by the filamentation of yeast, and plays a critical role in BF.


Assuntos
Biofilmes/crescimento & desenvolvimento , Candida tropicalis/química , Candida tropicalis/fisiologia , Candidíase/microbiologia , Adesão Celular , Interações Hidrofóbicas e Hidrofílicas , Propriedades de Superfície , Candida tropicalis/citologia , Candida tropicalis/isolamento & purificação , Feminino , Humanos , Pacientes Internados , Plásticos , Temperatura , Centros de Atenção Terciária
10.
Cir Pediatr ; 25(4): 187-92, 2012 Oct.
Artigo em Espanhol | MEDLINE | ID: mdl-23659019

RESUMO

OBJECTIVE: In 2011 we have diagnosed 9 anorectal malformations (MAR). This means 13.3 cases/10.000 NB versusu the estimated incidence of 2 cases/10.000 NB. This accumulation of defects can not be due to chance, so we have decided to focus on its research. MATERIAL AND METHODS: The study included all the patients with anorrectal malformations born in 2011. In all of them we analyzed: geographic area, age and health status of parents, pregnancy, exposure to teratogens, especially lorazepam intake, sex, gestational age, weight at birth, exploration of the abdomen and perineum, birth defects associated, imaging studies performed, treatment and current situation. RESULTS: All patients came from our province, and maternal age is under 20 years in 2 patientes and older than 30 in 7; male-dominated (8/1); low forms in 4 of 9 patients. 100% of newborns have some type of associated malformation, in genitals, urinary system or costovertebral. Clinical assessment and imaging study provided the right diagnosis in all the cases. It must be noted the absence of difficulties in the surgery treatment and a favorable outcome in all children. CONCLUSIONS: To this accumulation of cases with anorrectal malformation cases it is added a male predominanced, and a high incidence of associatedmalformations and high defects. We have not found an epidemiological explanation for this concentration of patients with anorrectal malformations. This forces us to continue our investigation if detected for some reason, currently not known.


Assuntos
Anormalidades Múltiplas/epidemiologia , Canal Anal/anormalidades , Anormalidades Congênitas/epidemiologia , Reto/anormalidades , Anormalidades Múltiplas/etiologia , Anormalidades Congênitas/etiologia , Feminino , Humanos , Recém-Nascido , Masculino
11.
Cir Pediatr ; 25(4): 211-2, 2012 Oct.
Artigo em Espanhol | MEDLINE | ID: mdl-23659025

RESUMO

We introduce a male patient with bilateral chryptorchidism submitted to surgery; during the intervention, macroscopically round macules were seen in the outer surface of both testes. In the round macules histological study, groups of seminiferous tubules were observed, including stroma and Leydig's intestitial cells surrounded of tunica albuginea, isolated from the rest of testicular parenchymal tissue; the diagnosis "Ectopic testicular parenchyma tissue" was confirmed by histopathological study. Due to the seminiferous tubules are surrounded by the tunica albuginea, with no apparent connection to the rest of the testicular parenchyma, a long-term assessment is required, both during puberty as well as in adulthood; owing to that can mislead and make unnecessary laparotomies and orchiectomies in the future.


Assuntos
Testículo/anormalidades , Criança , Humanos , Masculino , Testículo/patologia , Testículo/cirurgia
12.
Cir Pediatr ; 24(2): 93-7, 2011 Apr.
Artigo em Espanhol | MEDLINE | ID: mdl-22097656

RESUMO

INTRODUCTION: Oesophageal pH monitoring is considered the best procedure to assess the severity of gastroesophageal reflux disease (GERD), conditioning its treatment. The indication for surgery is becoming less common. We intend to meet this test to what extent it has influenced. MATERIAL AND METHODS: We recruit patients treated in our Centre since the introduction of pH monitoring. We compare the number of times before and after its use. We value clinical manifestations, usual pH metric values versus non-operated patients with pathological test, associated pathology. SAMPLE: 91 patients, 151 pH metric studies (98 preoperative). Number of interventions prior to introduction of pH monitoring: 20/year, post: 3.79/year. SYMPTOMS: gastrointestinal 60.2%, respiratory 10.2%, mixed 24.5%. 495 non-operated patients, 692 pathological studies. PH metric values operated/not operated: No. reflux 116.91 +/- 125.46/101.69 +/- 83.39 (p < 0.001), No. reflux >5 minutes 8.49 +/- 8.28/4.43 +/- 4.85 (p = 0.001), longest reflux 60.21 +/- 95.93/31.16 +/- 80.09 (p < 0.001), clearance 1.27 +/- 1.44/0.86 +/- 1.05 (p = 0.04), DeMeester 52.74 +/- 56.21/29.49 +/- 23.57 (p < 0.001). 14 of 98 preoperative pH monitoring were normal. Associated pathology operated/not operated: 13.26%/ 7.47%. CONCLUSIONS: The pH metric control of patients with GERD and the progress of medical treatment have led to a decrease in surgical procedures. In our experience, the intensity of GERD is a valuable parameter in deciding on the surgery. We attach particular value parameters measuring oesophageal clearance and indices that integrate several of them. However, in some patients without pathological pH monitoring, we have indicated the operation. The prevalence of associated pathology in the operated makes us value them more demanding.


Assuntos
Monitoramento do pH Esofágico , Refluxo Gastroesofágico/cirurgia , Criança , Pré-Escolar , Estudos Transversais , Feminino , Refluxo Gastroesofágico/metabolismo , Humanos , Masculino , Estudos Retrospectivos
14.
Cir Pediatr ; 24(3): 156-60, 2011 Aug.
Artigo em Espanhol | MEDLINE | ID: mdl-22295657

RESUMO

OBJECTIVE: The object is to present our experience with the small left colon syndrome (SLCS) and to investigate the usefulness of the anorrectal manometry in the study of these patients. MATERIAL AND METHODS: This was a retrospective review of the clinical histories of 10 patients treated in our Hospital for SLCS. The following variables are valued: sex, mother precedents, type of childbirth, gestational age, birth weight, clinical presentation (low colonic obstruction), delayed meconium passage, contrast enema with gastrografin, anorrectal manometry and treatment (Nursing, days of digestive rest, time of parenteral nutrition). RESULTS: During the study period, 10 patient were identified (5 are men). SLCS is reported in 2 sets of twins; in one set both twins are affected and in the other set 1 twin is affected. Maternal diabetes was identified in 6 patients. The mean gestational age was 36.6 + 2.11 weeks, and the weight 3001 +/- 689.72 g. 2 patient presented anomalies associated: fetopatía diabetic, hemivértebras D11-L2. All 10 infants presented abdominal distention and vomiting at 48.73 +/- 45.39 hours of life. Only 2 presented meconium passage in the first 24 hours. The contrast enema with gastrografin performed show typical findings of this syndrome in all cases. The anorrectal manometry carries out in 8 patients and demonstrates presence of the recto-anal inhibitory reflex (RAIR) in 5 and absence in 3. In these 3 patients with no RAIR, the study was repeated weekly until the presence being observed (normally between 2a and 3a week of life). In 1 newborn was necessary colostomy; the suction rectal biopsy showed immaturity of ganglionars cells and the manometric control previously at the close of the colostomy (9 months) showed presence of the RAIR. Conservative treatment (nursing and digestive rest) was successful in all cases with a mean of duration the 6.40 +/- 5.10 days. 6 patient needed parenteral nutrition during 7.30 +/- 8.49 days. The mean of discharge was 17.78 +/- 13.28 days. The clinical development was favourable in all the cases. CONCLUSIONS: The contrast enema with gastrografin is diagnostic and therapeutic and together with the nursing, has allowed solve the distal intestinal obstruction in 9 cases (90%). In the newborns with absence of RIAR, the anomanometric controls have allowed to know the moment of the maturation of the anorectal function.


Assuntos
Doenças do Colo , Obstrução Intestinal , Doenças do Colo/diagnóstico , Doenças do Colo/terapia , Feminino , Humanos , Recém-Nascido , Obstrução Intestinal/diagnóstico , Obstrução Intestinal/terapia , Masculino , Estudos Retrospectivos , Síndrome
15.
Cir Pediatr ; 23(1): 35-9, 2010 Jan.
Artigo em Espanhol | MEDLINE | ID: mdl-20578576

RESUMO

INTRODUCTION: Total colectomy is the only effective treatment for prophylaxis against colon cancer in patients with familial adenomatous polyposis (FAP). We present our experience with 4 children colectomized for FAP, with a particular focus on the long-term surveillance to detect extracolonic manifestations. PATIENTS AND METHODS: We review the clinical histories of 4 patients from 10 to 16-years-old, with family histories of FAP. Performed for each patient were: genetic testing, colonoscopy, double contrast enema, gastro-oesophageal duodenoscopy, thyroid and abdominal ultrasound, fundus oculi, and tumour markers (CEA, CA 19.9). They underwent total colectomy with ileoanal anastomosis and anorectal mucosectomy with an ileal J-pouch. During follow-up, they were monitored regularly with imaging techniques (including a video capsule in one patient) and endoscopy. Also evaluated were faecal continence, food intake, and height-weight development. RESULTS: All had multiple polyps in the colon, and mutation of the APC gene. Hypertrophy of the retinal pigment epithelium was observed in three. Immediately postoperative, there were abundant diarrhoeic stools, two presented an episode of "pouchitis", and one moderate undernourishment. One patient had an intraperitoneal haemorrhage that was resolved by blood transfusion. All 4 have normal faecal continence. During the first months postoperative, two patients showed considerable weight loss. In the follow-up (> 3 years), moderate undernourishment was observed in one patient. Duodenal polyps were found in two patients--in one by duodenoscopy, and in the other with the video capsule. CONCLUSIONS: After colectomy, FAP patients may develop extracolonic clinical manifestations, some of which may be malignant such as thyroid and periampullary cancer. Careful surveillance of these patients is therefore very important, with annual checks using gastroduodenoscopy and thyroid and abdominal ultrasound.


Assuntos
Polipose Adenomatosa do Colo/complicações , Polipose Adenomatosa do Colo/cirurgia , Adolescente , Criança , Feminino , Seguimentos , Humanos , Masculino
16.
Cir Pediatr ; 23(3): 137-40, 2010 Jul.
Artigo em Espanhol | MEDLINE | ID: mdl-23155657

RESUMO

OBJECTIVES: The surgical close of patent ductus arteriosus in the extreme or very extreme premature presents difficulties, because of its anaesthesia, surgical intervention and the clinical circumstances that usually accompany this pathology. We reviewed our experience in order to understand the factors that have contributed to the obtained results. METHODS: In all the reviewed patients we evalue: gestational age, birth weight, drug treatment, surgical close, incidence of bronchopulmonary dysplasia, necrotizing enterocolitis and renal failure, time of hospitalization, mortality and its causes. RESULTS: The sample is constituted of 26 prematures whose average gestational age is 26.24 weeks and average weight 885 g. 22 were treated with indomethacin, at an average age of 7 days, and all of them underwent surgical close, at an average age of 19 days (0-50). 10 patients suffered bronchopulmonary dysplasia, operated when they were 28 days of life. 7 suffered renal failure, 5 of them after drug treatment. 6 suffered necrotizing enterocolitis. 7 died (27%), 3 of them because of prematurity and preoperative severe pathology, 2 because of heart disease, and 2 because of severe necrotizing enterocolitis. CONCLUSIONS: Surgical ligation of patent ductus arteriosus in these patients is well tolerated, especially if the attention to prevent bronchopulmonary dysplasia, necrotizing enterocolitis and renal failure is optimized. Mortality in our series is not very different from that provided for the total of prematures with similar gestational age and birth weight, regardless of their pathology.


Assuntos
Permeabilidade do Canal Arterial/cirurgia , Feminino , Humanos , Lactente Extremamente Prematuro , Recém-Nascido , Masculino
17.
Cir Pediatr ; 22(2): 106-8, 2009 Apr.
Artigo em Espanhol | MEDLINE | ID: mdl-19715137

RESUMO

One of the more severe urology complications are the forgetfulness of surgical instruments or materials (compress, gauzes...), with different types of complications. We present a male, operated of left hydronephosis. The post surgical catheter was retired five days after the anterograde urography, being all normal. But, in the new urography, practised six month after, a little fragment of catheter was discover, being necessary to do a new lobotomy and extraction. After revised the paediatric-urology bibliography, we note the very few articles about surgical complications, which is not the case of the adult's urologist. And this is very negative to the resident training, and also to our patients.


Assuntos
Falha de Equipamento , Corpos Estranhos/etiologia , Pelve Renal/cirurgia , Complicações Pós-Operatórias/etiologia , Cateterismo Urinário/instrumentação , Humanos , Lactente , Masculino
18.
Comp Biochem Physiol B Biochem Mol Biol ; 154(4): 406-11, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19706336

RESUMO

The aim of this work was to study comparatively the oxidative metabolism in gills and liver of a silverside, Odontesthes nigricans, in their natural environment, the Beagle Channel. Oxidative damage to lipids was evaluated by assessing TBARS and lipid radical content, in gills and liver. Gills showed a significantly higher degree of damage than liver. The content of alpha-tocopherol, beta-carotene and catalase activity showed significantly higher values in the liver than in the gills. The ascorbyl radical (A(*)) content showed no significant differences between gills and liver. The ascorbate (AH(-)) content was 12+/-2 and 159+/-28 nmol/mg FW in gills and liver, respectively. Oxidative metabolism at the hydrophilic level was assessed as the ratio A(*)/AH(-). The ratio A(*)/AH(-) was significantly different between organs, (6+/-2)10(-5) and (5+/-2)10(-6), for the gills and the liver, respectively. Both, lipid radical content/alpha-tocopherol content and lipid radical content/beta-carotene content ratios were significantly higher in gills as compared to the values recorded for the liver, suggesting an increased situation of oxidative stress condition in the lipid phase of the gills. Taken as a whole, the O. nigricans liver exhibited a better control of oxidative damage than the gills, allowing minimization of intracellular damage when exposed to environmental stressing conditions.


Assuntos
Peixes/metabolismo , Brânquias/metabolismo , Fígado/metabolismo , Animais , Antioxidantes/metabolismo , Espectroscopia de Ressonância de Spin Eletrônica , Feminino , Peixes/anatomia & histologia , Radicais Livres/metabolismo , Brânquias/citologia , Espaço Intracelular/metabolismo , Metabolismo dos Lipídeos , Peroxidação de Lipídeos , Fígado/citologia , Masculino , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Água/metabolismo
20.
Managua; Organización Panamericana de la Salud; 2007. 160 p.
Monografia em Espanhol | LILACS | ID: lil-474966
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